scholarly journals The influence of thermal treatment on the electrochemical properties of carbon–Ni–Pd composites

2014 ◽  
Vol 71 (1) ◽  
pp. 109-117 ◽  
Author(s):  
Jan M. Skowroński ◽  
Małgorzata Osińska
Keyword(s):  
Thermal Treatment ◽  
Electrochemical Properties

Preparation of Niobium Oxides Cathodes by Chimie Douce and Some Electrochemical Properties

1998 ◽  
Vol 548 ◽  
Author(s):  
A. Hernandez ◽  
E. Sanchez ◽  
L. C. Torres-Gonzalez ◽  
A. F. Fuentes ◽  
L. M. Torres-Martinez
Keyword(s):  
Thermal Treatment ◽  
Electrochemical Properties ◽  
Niobium Oxide ◽  
Sol Gel ◽  
Electrochemical Methods ◽  
Niobium Oxides ◽  
Gel Preparation

ABSTRACTSol gel chemistry has been a useful technique to achieve hard-to-prepare metastable materials. Niobium oxide, for instance has a thermodynamic preference to crystallize on monocyclic lattice. Here, we were able to achieve synthesis of orthorhombic motif with a careful sol-gel preparation and tailored thermal treatment. Furthermore, formation of lithium inserted Nb205 phases were studied by electrochemical methods. When lithium is inserted, several single phases LixNb205 were observed in the range of 0 ≤ x ≤ 3.3 between 3.0 and 0.75 V. Even though the reaction is only reversible for x ≤ 1.8. Also, T-Nb205 polymorph showed improved intercalation characteristics.

Iron(III) Phosphates Obtained by Thermal Treatment of the Tavorite-Type FePO4·H2O Material: Structures and Electrochemical Properties in Lithium Batteries

2012 ◽  
Vol 51 (5) ◽  
pp. 3146-3155 ◽  
Author(s):  
Nicolas Marx ◽  
Lydie Bourgeois ◽  
Dany Carlier ◽  
Alain Wattiaux ◽  
Emmanuelle Suard ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Electrochemical Properties ◽  
Lithium Batteries

scholarly journals Electrochemical Properties and Structure Evolution of Starch-Based Carbon Nanomaterials as Li-Ion Anodes with Regard to Thermal Treatment

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1527 ◽  
Author(s):  
Marcelina Kubicka ◽  
Monika Bakierska ◽  
Krystian Chudzik ◽  
Małgorzata Rutkowska ◽  
Joanna Pacek ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Electrochemical Properties ◽  
Carbon Nanomaterials ◽  
Electrochemical Impedance ◽  
Structure Evolution ◽  
Carbon Aerogels ◽  
Electrochemical Characteristics ◽  
Li Ion ◽  
Working Parameters ◽  
Carbon Anodes

The influence of the pyrolysis temperature on the structural, textural, and electrochemical properties of carbon aerogels obtained from potato, maize, and rice starches was analyzed. The carbonization of organic precursors, followed by gelatinization, exchange of solvent, and drying process, was carried out in an argon atmosphere at temperatures ranging from 600 °C to 1600 °C. The nanostructured carbons were characterized by X-ray powder diffraction (XRD) as well as N2-adsorption/desorption (N2-BET) methods. The electrochemical behavior of Li-ion cells based on the fabricated carbon anodes was investigated using the galvanostatic charge/discharge tests (GCDT) and electrochemical impedance spectroscopy (EIS). The results show that the thermal treatment stage has a crucial impact on the proper formation of the aerogel material’s porous structures and also on their working parameters as anode materials. The highest relative development of the external surface was obtained for the samples pyrolysed at 700 °C, which exhibited the best electrochemical characteristics (the highest specific capacities as well as the lowest charge transfer resistances).

Influence of Thermal Treatment on the Electrochemical Properties of Ni+Mo Composite Coatings in an Alkaline Solution

2015 ◽  
Vol 228 ◽  
pp. 231-236 ◽  
Author(s):  
Magdalena Popczyk ◽  
B. Łosiewicz ◽  
Eugeniusz Łągiewka ◽  
A. Budniok
Keyword(s):  
Thermal Treatment ◽  
Electrochemical Properties ◽  
Composite Coatings ◽  
Electrochemical Corrosion ◽  
X Ray Diffraction ◽  
Corrosion Resistant ◽  
X Ray ◽  
Electrochemical Corrosion Resistance ◽  
Galvanostatic Conditions ◽  
Xrd Method

The Ni+Mo composite coatings were prepared by electrodeposition under the galvanostatic conditions (jdep= -300 mA cm-2) from the nickel bath containing molybdenum powders of different granulation (3-7 μm, <150 μm, <100 nm). Thermal treatment of the obtained coatings was conducted in the argon atmosphere. The surface morphology of the coatings was studied using a scanning electron microscopy (SEM). Chemical composition of the electrodeposits was determined by X-ray fluorescence spectroscopy (XRF). Phase composition investigations were conducted by X-ray diffraction (XRD) method. Investigations of hydrogen evolution reaction (HER) and electrochemical corrosion resistance were carried out in 5 M KOH solution. It was found that for the Ni+Mo thermally treated coatings the decrease in activity towards the HER was observed. Simultaneously these coatings are more corrosion resistant than Ni+Mo as-deposited coatings. The reasons for the electrochemical properties of these coatings have been discussed.

ChemInform Abstract: Iron(III) Phosphates Obtained by Thermal Treatment of the Tavorite-Type FePO4·H2O Material: Structures and Electrochemical Properties in Lithium Batteries.

ChemInform ◽  
2012 ◽  
Vol 43 (22) ◽  
pp. no-no
Author(s):  
Nicolas Marx ◽  
Lydie Bourgeois ◽  
Dany Carlier ◽  
Alain Wattiaux ◽  
Emmanuelle Suard ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Electrochemical Properties ◽  
Lithium Batteries
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